Nokia Nokia Certifications 4A0-106 Questions & Answers

• Question 131:

  Click the exhibit.

  

  Community lists are configured for the PE hub and spoke VPRN. Which communities should be exported by the VPRN service on PE1?

  A. "Spoke.Sites" and "Hub_Site"

  B. "Spoke_Sites"

  C. "Hub_Site"

  D. No communities should be exported

  Correct Answer: C

• Question 132:

  Which of the following about BGP loops in a VPRN environment is FALSE?

  A. Traditional BGP loop detection mechanisms may detect a loop in the VPRN scenario, which in fact is not present.

  B. The Alcatel-Lucent 7750 SR accepts routes containing AS_PATH loops by default.

  C. When the CLI command "config>router>bgp# loop-detect discard-route" is used, the Alcatel-Lucent 7750 SR sends a notification to the remote peer and drops the BGP session.

  D. In VPRN implementations where the CE-PE protocol is BGP, it is possible for separate sites of the same customer to use the same BGP autonomous system number.

  Correct Answer: C

• Question 133:

  Click the exhibit.

  

  According to the display, a BGP loop is detected for route 192.168.1.0/27. On which router is this command executed?

  A. CE1

  B. CE2

  C. PE1

  D. PE2

  Correct Answer: B

• Question 134:

  Click the exhibit.

  

  Which of the following best describes the output?

  A. The AS-Path is not present because a policy is configured on PE2 to set it to null.

  B. The AS-Path is not present because a policy is configured on CE1 to set it to null.

  C. The AS-Path is not present because a policy is configured on PE1 to set it to null.

  D. The AS-Path is not present because VPN-IPv4 routes do not propagate the IPv4 AS-Path BGP attribute.

  Correct Answer: C

• Question 135:

  A customer has two sites connected to PE-1 and a third site dual-homed to PE-2 and PE-3. If BGP is used as the PE-CE protocol, what is the total number of BGP and MP-BGP sessions required on PE-1 for a functional VPRN service? Assume that route reflection is not used.

  A. 0 BGP and 2 MP-BGP sessions

  B. 2 BGP and 0 MP-BGP sessions

  C. 2 BGP and 1 MP-BGP sessions

  D. 2 BGP and 2 MP-BGP sessions

  E. 1 BGP and 2 MP-BGP sessions

  Correct Answer: D

• Question 136:

  Which of the following about BGP Site of Origin (SoO) is FALSE?

  A. The SoO attribute can be used to uniquely identify the site from which a PE learns routes.

  B. Before a PE redistributes a VPN-IPv4 route, it can assign an SoO attribute to the route.

  C. The SoO attribute can be used to prevent loops from a single site with multiple CE-PE connections.

  D. The SoO attribute can be used as matching criteria when redistributing routes from the CE to the PE.

  Correct Answer: D

• Question 137:

  When does a router add a Route Target to a route?

  A. When the P receives the route from the PE.

  B. When the PE populates the route received from the CE into the VRF.

  C. When the PE propagates the route to the CE.

  D. When the PE exports the route from the VRF into the MP-BGP table.

  Correct Answer: D

• Question 138:

  Which of the following VPRN label allocation methods are supported by the Alcatel-Lucent 7750 SR?

  A. One label per VRF per route

  B. One label per VRF per next-hop

  C. One label per VRF

  D. All of the above

  E. A and C

  F. B and C

  Correct Answer: F

• Question 139:

  Click the exhibit.

  

  An Alcatel-Lucent 7750 SR is to be configured as a core router that supports VPRNs using LDP as the transport protocol. Which of the following best describes this configuration?

  A. This configuration is correct and complete.

  B. This configuration is correct, but the interfaces must also be configured in the "configure router mpls" context.

  C. There is no configuration required for LDP in the core network.

  D. This configuration is correct but Targeted-LDP is also required.

  Correct Answer: A

• Question 140:

  Which of the following about an Alcatel-Lucent 7750 SR MP-BGP update is FALSE? Assume default behavior.

  A. An MP-BGP update carries an MPLS label that is used as the service label for a VPRN.

  B. There can be multiple Route Targets per route in an MP-BGP update.

  C. There can only be one Route Distinguisher per route in an MP-BGP update.

  D. On a specific PE, the MP-BGP updates for prefixes from a single VPRN carry different labels.

  E. Traditional BGP attributes and MP-BGP attributes are present in an MP-BGP update.

  Correct Answer: D